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- harmonic frequency generator 谐频发生器
- With HTS Josephson junction as the mixing element, 50th harmonic frequency mixing at 3mm wave band is obtained on the system. 在该系统上成功实现了高温超导混频器在3毫米波段的50次谐波混频。
- A filter with a tuning frequency more than 10% below the lowest harmonic frequency with considerable current/voltage amplitude. 在相当大的电流/电压幅值时.;滤波器的调谐频率比最低值的谐波频率还要低10%25以上
- The heterodyning principle is well known in nonlinear optics as difference frequency generation (DFG). 在非线性光学领域,超外差原理就是著名的差频产生(DFG)技术。
- A high efficiency dual-band RF power amplifier has an output and/or input of a high frequency transistor well terminated at the second harmonic frequency for dual-band operation. 本发明乃一种高效率双频射频功率放大器,提供高频电晶体的输出端与?或输入端于双频操作中有良好的二阶谐波终止。
- Purpose: Audio frequency general purpose ,driver stage amplifier applications. 用途:用于音频放大,激励级放大。
- Various wavelength conversion (WC) techniques are introduced, and two are chosen to be used in all optical transparent networks. These are four wave mixing (FWM) and difference frequency generation (DFG). 该文首先简单介绍各种波长变换技术;对比它们的优缺点;选出两种能用于未来全光透明网络中的波长变换技术:四波混频波长变换技术和差频波长变换技术.
- Harmonic frequencies in the power grid are a frequent cause of power quality problems. 谐波频率在电网中是造成电能质量问题的常见原因。
- A novel all-optical wavelength conversion (AOWC) based on the cascaded sum frequency generation (SFG) and difference frequency generation (DFG) in LiNbO?3 waveguides have been theoretically studied. 对基于级联和频差频非线性效应铌酸锂光波导新型全光波长转换器进行了理论研究。
- The principle of all-optical wavelength conversion based on the cascaded sum and difference frequency generation (SFG+DFG) in quasi-phase-matched (QPM) periodically poled LiNbO3 (PPLN) waveguides is introduced. 介绍了基于准相位匹配周期极化反转铌酸锂光波导的和频与差频(SFG+DFG)级联型全光波长转换技术的基本原理。
- In chapter five, the generation principle of THz-wave is introduced. The generation of THz-wave using Cerenkov-type difference frequency generation (DFG) is also discussed theoretically. 第五章讨论了THz波的产生机理,并对切伦科夫型差频产生THz波进行了理论分析。
- Unfortunately, they also suffer from some disadvantages, such as poor rejection to outside passband, and they are easily to be disturbed by high order harmonic frequencies. 但是也都存在一些共同缺陷,诸如带外抑制能力较差,容易受到高次谐波分量的干扰等等。
- All-optical wavelength conversion (AOWC) is mainly implemented by using four nonlinear effects: cross gain modulation (XGM), cross phase modulation (XPM), four wave mixing (FWM), and difference frequency generation (DFG). 实现全光波长转换主要利用四种非线性效应 :交叉增益调制 (XGM)、交叉相位调制 (XPM)、四波混频 (FWM)和差频 (DFG)效应。
- Recently, SFG (sum frequency generation vibrational spectroscopy) has been developed into a powerful technique to probe in-situ surface composition and orientation information at submolecular level. 近年来发展起来的和频振动光谱(SFG)能在准单分子层水平上原位研究聚合物表面的基团及其取向等信息,被认为是表征聚合物界面结构的最佳技术手段之一。
- Harmonic Frequency Synthesizer and FSK Modulator 谐波频率合成器与FSK调制器
- A novel all-optical wavelength conversion (AOWC) based on the cascaded sum frequency generation (SFG) and difference frequency generation (DFG) in LiNbO3 waveguides have been theoretically studied. 对基于级联和频差频非线性效应铌酸锂光波导新型全光波长转换器进行了理论研究。
- harmonic frequency of loudspeakers 扬声器谐振频率
- harmonic frequency characteristic 谐波频率特性
- graded harmonic frequency telegraphy 分级谐频电报
- Voltage and frequency generated by synchronous generator vary along with the wind variation, so the power must be dealt with before it is applied to grid. 同步直驱风力发电系统的定子电压和频率随风速的变化而变化,需要经过一系列控制电路的调整才能并网。